Malicious PDF — malware analysis report

Static analysis result for SHA-256 8432fed998821015…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 14:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e41b05eca40782d2406322a19cecbed SHA-1: ac11b86ad604497cfe8a9abc3aa54869a27701de SHA-256: 8432fed9988210158fbaea43e34e90ce42eacd2b6d66addb041ce1207a46ec77
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a lure text suggesting it is a free Spanish Bible, but embeds a link to a known malicious redirector. This redirector then points to a large number of other PDF files hosted on Shopify, likely as part of a link farm to improve search engine ranking for malicious content. The primary malicious IOC is the initial redirector URL.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=biblia+reina+valera+pdf+gratis+espa%25C3%25B1ol
    • http://files.michaelabandostudio.com/uploads/1/3/1/8/131857565/e5b7c4.pdf
    • http://vizave.bobericphotography.com/uploads/1/3/0/8/130874493/kugowewawetefu.pdf
    • http://xubewi.nyabuoy.com/uploads/1/3/1/6/131606349/zibifofi_sejodosix_bariza.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/44348056107.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/7982254309.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/36727074322.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6909/files/xalipixubugirumu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8601/8712/files/43963239689.pdf
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/48403504194.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/manual_fuel_tank_selector_valve.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2962/files/jubegetufarasav.pdf
    • https://cdn.shopify.com/s/files/1/0436/5484/0485/files/l_argumentation_commerciale.pdf
    • https://cdn.shopify.com/s/files/1/0433/2224/5273/files/riwisefozesozun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005228.bin
40a4bae3361ed5e43c0f85c281287d611620223058524076e472c1b8354a58e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5228 5668 bytes
font_01_sfnt_off00006531.bin
d2cd98eda3bb301c349f83497b116709750aa4c373c9bd198ee53ee8aab646d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 1936 bytes
font_02_sfnt_off00006e73.bin
c33bb679fe6f3fadc59f9e48ead28acc0caedf261a12a291c5a4f7eef143a28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 11112 bytes

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